Passing JSP encrypted parameters to a servlet

I want to pass encrypted parameters via a JSP form to frmservlet.I want to pass userid by encrypting it.But it is not decrypt by the frms开发者_开发知识库rvlet,How can I do this?

---

Serve your page over HTTPS, and have

<form action="https://yoursite/yourctx/yourServlet">

You'd have to enable SSL/TLS on your server.